Connected: An Internet Encyclopedia
RFC 1725 - 8. POP3 Command Summary

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### 8. POP3 Command Summary

Minimal POP3 Commands:

          USER name               valid in the AUTHORIZATION state
          PASS string
          QUIT

          STAT                    valid in the TRANSACTION state
          LIST [msg]
          RETR msg
          DELE msg
          NOOP
          RSET

          QUIT                    valid in the UPDATE state

       Optional POP3 Commands:

          APOP name digest        valid in the AUTHORIZATION state

          TOP msg n               valid in the TRANSACTION state
          UIDL [msg]

       POP3 Replies:

          +OK
          -ERR

Note that with the exception of the STAT, LIST, and UIDL commands, the reply given by the POP3 server to any command is significant only to "+OK" and "-ERR". Any text occurring after this reply may be ignored by the client.

Next: 9. Example POP3 Session

Connected: An Internet Encyclopedia
RFC 1725 - 8. POP3 Command Summary